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2 items @ $85.00  

Rare Minerals

Monday, 20 January 2025 06:00 PM

Introducing the "Rare Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including cancrinite, christofschäferite-(ce), clinoptilolite-na, creedite, dietzeite, and gold and more from places like Bancroft, Ontario, Canada, Wingertsberg, Eifel Volcanic Fields, Germany, Madras, Jefferson Co., Oregon, United States, Liberty (Hall) mine, Nye Co., Nevada, United States, Taltal, Antofagasta Prov., Antofagasta, Chile, and Berezovskoe Au dep., Berezovskii, Sverdlovskaya Oblast', Urals, Russia.

Cancrinite

#BAC65358
Locality
Bancroft, Ontario, Canada 
Formula
(Na,Ca,□)8(Al6Si6)O24(CO3,SO4)2·2H2
Availability
Sold
Size
4 x 2.5 x 2 cm - Miniature 

Orange yellow partial crystal of Cancrinite. Cancrinite belongs to group of minerals which form from melts undersaturated with respect to silica. 


Cancrinite

Formula
(Na,Ca,[box])8(Al6Si6)O24(CO3,SO4)2·2H2
Crystal System
Hexagonal 
Crystal Habit
Massive, Prismatic 
Cleavage
Perfect, None, None 
Luster
Vitreous (Glassy) 
Color
blue, colorless, gray green, yellow, white 
Streak
white 
Class
Hexagonal - Pyramidal 
Fracture
Conchoidal 
Hardness
Collection
William & Anne Cook Collection

Christofschäferite-(Ce)

#BAC62508a
Locality
Wingertsberg, Eifel Volcanic Fields, Germany 
Formula
Ce3CaMnTiFe(3+)Ti2(Si2O7)2O8 
Availability
Sold
Size
0.3 x 0.3 x 0.2 cm - Thumbnail 
Tagged
REE mineral  
Special Info
Type Locality 

Jet black like glossy coal in mal-formed crystals not like the nice Mindat photos. Ex. Dr. Jaroslav Hyrsl specimen. It is a two-locality mineral, this being the type.


Collection
William & Anne Cook Collection
Special Info
Type Locality
SOLD
Clinoptilolite-Na - BAC65298
Clinoptilolite-Na - BAC65298

Clinoptilolite-Na

#BAC65298
Locality
Madras, Jefferson Co., Oregon, United States 
Formula
Na6(Si30Al6)O72·20H2
Availability
Sold
Size
1.5 x 1.3 x 1 cm - Thumbnail 

Deep orange beautiful crystals less than 0.75mm with a little white fibrous Mordenite.


Clinoptilolite-Na

Formula
Na6(Si30Al6)O72·20H2
Crystal System
Monoclinic 
Crystal Habit
Tabular, Crystalline - Fine 
Cleavage
Perfect, None, None 
Luster
Vitreous (Glassy) 
Color
white, reddish white 
Streak
white 
Class
Monoclinic 
Fracture
Uneven 
Hardness
3.5-4 
Collection
William & Anne Cook Collection

Creedite

#BAC65345
Locality
Liberty (Hall) mine, Nye Co., Nevada, United States 
Formula
Ca3Al2(SO4)(OH)2F8·2H2
Availability
Sold
Size
6 x 4 x 3.5 cm - Sm Cabinet 

Excellent pointed purple crystals to 6mm in an open vug.


Creedite

Formula
Ca3Al2(SO4)(OH)2F8·2H2
Crystal System
Monoclinic 
Crystal Habit
Granular, Radial, Prismatic 
Cleavage
Perfect, None, None 
Luster
Vitreous - Greasy 
Color
colorless, violet, white 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Conchoidal 
Hardness
3.5 
Collection
William & Anne Cook Collection
Mineralpedia
View Creedite
On Dakota Matrix
Previously Sold Creedite
On Dakota Matrix
Other Available Creedite
WebMineral
View Creedite
Mindat
View Creedite

Dietzeite

#CS65306
Locality
Taltal, Antofagasta Prov., Antofagasta, Chile 
Formula
Ca2(IO3)2CrO4·H2
Availability
Sold
Size
2.7 x 2.3 x 1.8 cm - Thumbnail 

Golden yellow, sugary, microcrystals less than 0.3mm in size. Very rare mineral and occurs chiefly in evaporitic arid environments with salts.


Dietzeite

Formula
Ca2(IO3)2CrO4·H2
Crystal System
Monoclinic 
Cleavage
Indistinct, None, None 
Luster
Vitreous (Glassy) 
Color
golden yellow 
Streak
light yellow 
Class
Monoclinic - Prismatic 
Fracture
Conchoidal 
Hardness
3.5 
Mineralpedia
View Dietzeite
On Dakota Matrix
Previously Sold Dietzeite
On Dakota Matrix
Other Available Dietzeite
WebMineral
View Dietzeite
Mindat
View Dietzeite

Gold

with Aikinite - #64509
Locality
Berezovskoe Au dep., Berezovskii, Sverdlovskaya Oblast', Urals, Russia 
Formula
Au 
Availability
Sold
Size
2.5 x 2.3 x 2.5 cm - Thumbnail 
Tagged
native element  

Nice piece of Gold grains to 4mm with silvery Aikinite.


Gold

Formula
Au 
Crystal System
Isometric 
Crystal Habit
Arborescent, Platy, Granular 
Cleavage
None, None, None 
Luster
Metallic 
Color
yellow, pale yellow, orange, yellow white, reddish white 
Streak
yellow 
Class
Isometric - Hexoctahedral 
Fracture
Hackly 
Hardness
2.5-3 
Mineralpedia
View Goldmanite
On Dakota Matrix
Previously Sold Gold
On Dakota Matrix
Other Available Gold
WebMineral
View Gold
Mindat
View Gold

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